It's nice on synthetic benchmarks but won't be just as fast in real usage. On the other hand it still just might be faster than any PPC accelerator Amiga ever had. BTW the same project just might open the door for even more PPC WOS-compatible expansions on more or less exotic CPUs (I myself have several MPC8245-266 MCUs for anyone interested, BGA though).

It is surprisingly complex, at this point sonnet.library is around 150kB of hand-crafted 68k and PPC assembly (and it's still nowhere near complete yet). Think of all necessary 68k-PPC synchronisation routines, message passing functions, scheduler etc.

API is quite well explained in documentation of original WarpOS, check it out.

Wow, this is unbelievable progress guys! Nice project, please keep it up, this would be great if you achieve it working like PowerPCs cooperation like it is now on our Blizzards and Cyberstorms under WarpOS.